By now everyone has read the plans to gate the Icecrown Citadel content. While I don't object to opening "wings" of the raid on a rolling basis, I have though of a consequence of the boss attempts gating:
The initial number of attempts provided for defeating Professor Putricide is only five. When Blood-Queen Lana'thel unlocks, the amount of total attempts remaining will increase to 10. Then when Sindragosa and the Lich King unlock, 15 total attempts will be available to defeat all four bosses.
I think this will be the death of the raid lockout extension, certainly in our guild.
Remember in 3.2 when they added the raid lockout extension feature? If you didn't have the time to kill all the bosses in Ulduar in 1 week, you could extend into the next week and have another crack.
Except now I am assuming your "boss attempts" will not get reset if you extend, so if you used them all up, what's the point of extending? You might as well reset and redo all the bosses again. Even if you used up 5 of the 10, I would think most raiders would want to hit the instance with all of their boss attempts available.
Say in one raid week you got a few attempts in on Lana'thel and now have 5 attempts left. You could extend into the next week and use those 5 attempts to try to down her. Or you could reset, clear the other bosses, assume a 1 or 2 shot on Putricide, then have 8 attempts left on Lana'thel. Even in our relatively casual guild, I think there will be a strong push for the latter approach. Worse if Sindragosa is available and we get stuck on Lana'thel with 5/15 left, we will definitely reset so we get more attempts on Sindragosa.
Goodbye raid lockout extension, though I hardly knew you at all!